ଚତୁର୍ଭୁଜ
ଯୁକ୍ଲିଡୀୟ ଜ୍ୟାମିତି ଅନୁସାରେ ଚତୁର୍ଭୁଜ ହେଉଛି, ଚାରି 'ବାହୁ' ଓ ଚାରି 'କୋଣ' ଥିବା ଏକ ବହୁଭୂଜ । ଏହା ସରଳ (କୌଣସି ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିନଥାନ୍ତି) କିମ୍ବା ଜଟିଳ (କୌଣସି ଦୁଇ ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିଥାନ୍ତି) ହେଇପାରେ । ସରଳ ଚତୁର୍ଭୁଜ, ଉତ୍ତଳ କିମ୍ବା ଅବତଳ ହେଇପାରେ ।
| Quadrilateral | |
|---|---|
 Six different types of quadrilaterals | |
| Edges and vertices | 4 |
| Schläfli symbol | {4} (for square) |
| Area | various methods; see below |
| Internal angle (degrees) | 90° (for square and rectangle) |
ଏହାର ଚାରି କୋଣର ସମଷ୍ଟି:
ଉତ୍ତଳ ଚତୁର୍ଭୁଜ
ସମ୍ପାଦନାଅବତଳ ଚତୁର୍ଭୁଜ
ସମ୍ପାଦନାଗାଣିତିକ ସମାଧାନ
ସମ୍ପାଦନାଆଧାର
ସମ୍ପାଦନାବାହାର ଲିଙ୍କ
ସମ୍ପାଦନା
ଉଇକିମିଡ଼ିଆ କମନ୍ସରେ Tetragons
ବାବଦରେ ମାଧ୍ୟମ ରହିଛି ।
- Weisstein, Eric W., "Quadrilateral", MathWorld.
- Encyclopedia of Quadri-Figures by Chris Van Tienhoven
- Compendium Geometry Analytic Geometry of Quadrilaterals
- Quadrilaterals Formed by Perpendicular Bisectors, Projective Collinearity and Interactive Classification of Quadrilaterals from cut-the-knot
- Definitions and examples of quadrilaterals and Definition and properties of tetragons from Mathopenref
- A (dynamic) Hierarchical Quadrilateral Tree at Dynamic Geometry Sketches
- An extended classification of quadrilaterals Archived 2019-12-30 at the Wayback Machine. at Dynamic Math Learning Homepage Archived 2018-08-25 at the Wayback Machine.
- Quadrilateral Venn Diagram Archived 2011-09-07 at the Wayback Machine. Quadrilaterals expressed in the form of a Venn diagram, where the areas are also the shape of the quadrilateral they describe.
- The role and function of a hierarchical classification of quadrilaterals Archived 2011-07-19 at the Wayback Machine. by Michael de Villiers